Snubbed bolster truck



Sept. 19, 1967 c T 3,342,139

SNUBBED BOLSTER TRUCK Filed Feb. 1, 1965 2 Sheets-Sheet 2 v Carf @w j50W I Patented Sept. 19, 1967 3,342,139 SNUBBED BOLSTER TRUCK CarlEdward Tack, Elmhurst, Ill., assignor t Amsted Industries Incorporated,Chicago, 11]., a corporation of New Jersey Filed Feb. 1, 1965, Ser. No.429,585 2 Claims. (Cl. 105--197) ABSTRACT OF THE DISCLOSURE A railwaycar truck comprises a friction shoe pocket defined by a back bolsterwall, a bottom bolster wall, and a bolster wedge wall extending upwardlyfrom the back wall and diverging therefrom. The wedge wall at itsjuncture with the back wall defines a recess. A wear plate of springmetal comprises a loop portion sprung into the recess, with the lowerend of said loop portion bearing against an abutment shoulder on thebottom wall facing the back wall. The upper end of the spring plate iswelded along the back side thereof to the upper end of the wedge wall.

This invention relates to railway car trucks and more particularly totruck provided with means to dampen vertical movements of a bolsterrelative to the side frames.

Briefly, the present invention contemplates the provision of a snubbedbolster truck embodying a friction shoe having a flat front faceengaging a vertical side frame column and spaced inclined surfacesengaging sloping wedge walls on the bolster, the shoe being urgedbetween the column and sloping wedge walls by a compression spring tofrictionally dampen vertical movements of the bolster. Duringreplacement of worn friction shoes, it was also sometimes necessary torepair worn sloping wedge walls on the bolster.

An object of the present invention resides in the provision of a bolsterprovided with wear plates overlying the sloping wedge walls forengagement by the friction shoes, to thereby prevent wear of the wedgewalls.

Another object of the invention resides in the provision of means fordetachably mounting the wear plates on a bolster to facilitatereplacement of worn wear plates.

A further object of the invention resides in the provision of a wearplate formed of hardened flat strip spring steel to prolong the servicelife of the wear plate.

The invention embodies other novel features, details of construction andarrangement of parts which are hereinafter set forth in thespecification and claims and illustrated in the accompanying drawings,forming part thereof, wherein:

FIGURE 1 is a side elevation showing a snubbed railway car truckembodying features of the invention.

FIGURE 2 is a fragmentary top plan view showing a friction shoe asmounted within a pocket in the bolster for frictional engagement againsta side frame column.

FIGURE 3 is an end elevation of the structure shown in FIGURE 2.

FIGURE 4 is a fragmentary transverse section illustrating a wear plateoverlying a wedge wall within a friction shoe pocket in the bolster.

FIGURE 5 is a fragmentary front elevation of the structure shown inFIGURE 4.

Referring now to the drawings for a better understanding of theinvention, the snubbed railway car truck is shown as comprising spacedtruss type side frames 2 supported at their ends upon wheel and axleassemblies 3 and having tension and compression members 4 and 6interconnected by spaced vertical columns 7 to define windows 8. Theside frames are connected by a bolster 9 having its ends projectingthrough the windows and resiliently supported upon spring groups 11seated on the tension members 4.

The bolster 9 is provided with pockets 12 adapted to receive frictionshoes 13 for frictional engagement against the side frame columns 7.Each pocket is defined by a back wall 14, a bottom 16, and spaced endwalls 17. Wedge walls 18 on the end walls slope upwardly from the backwall toward a column 7, the lower end of each wedge wall defining withthe back wall 14 and bottom 16 a recess 19 to receive the loop end 21 ofa wear plate '22.

The wear plate 22 is formed from a length of strip spring metal and thenhardened to provide a hard wear surface for engagement by a frictionshoe, the plate having a straight shank 23 merging with a resilient loopportion 21 adapted to be sprung into the recess 19 with its end inabutting engagement against a shoulder 24 in the bottom 16. The upperend of the shank 23 is tack welded at 26 to the upper end of the wedgewall 18.

The friction shoe 13 is provided with a fiat vertical front face 27engaging a column 7 and having spaced inclined surfaces 28 engaging thewear plates 22, the shoe being urged upwardly between the column andwear plates by a compression pring 29.

I claim:

1. In a railway car truck having spaced side frames interconnected by abolster, said bolster being resiliently supported at its end upon theside frames for vertical movement relative thereto, said bolster havinga friction shoe pocket defined by a bottom bolster wall, a back bolsterwall, and a bolster wedge wall diverging upwardly from the back wall,said bottom, back and wedge walls defining a recess at the bottom of thewedge wall, a wear plate of hardened spring metal having a shankengaging a wedge wall and a loop portion sprung into said recess withsaid loop portion engaged at its lower edge against an abutment shoulderon the bottom wall, said shoulder facing the back wall, the upper end ofsaid wear plate being tack welded to said wedge wall, a friction shoeengaging the plate and the side frame, and actuating means for the shoe.

2. In a railway car truck having spaced side frames interconnected by abolster, said bolster being resiliently supported at its ends upon theside frames for vertical movement between spaced vertical columns, saidbolster having friction shoe pockets provided with a bottom wall, a backwall, and spaced substantially coplanar wedge walls diverging upwardlyfrom the back wall, said bottom, back and wedge walls defining recesses,wear plates of hardened spring metal each having a shank engaging arelated wedge wall and a loop portion sprung into a related recess withits lower end engaged against an abutment shoulder on the bottom wall,said shoulder facing the back wall, the upper end of each wear platebeing tack welded to its wedge wall, a friction shoe in each pocket andhaving a front surface engaging a column and inclined surfaces engagingthe wear plates, and a compression spring urging its shoe against thecolumn and wear plates.

References Cited UNITED STATES PATENTS 2,257,109 9/1941 Davidson -1972,485,104 10/1949 Maatman 105-197 2,485,970 10/1949 Lehrman 105-1972,578,480 12/1951 Lehrman 105-l97 2,597,909 5/1952 Tack 105197 2,672,1023/1954 Davidson 105-197 2,777,400 1/1957 Forssell l05197 ARTHUR L. LAPOINT, Primary Examiner. H. BELT RAN, Assistant Examiner.

1. IN A RAILWAY CAR TRUCK HAVING SPACED SIDE FRAMES INTERCONNECTED BY ABOLSTER, BEING RESILIENTLY SUPPORTED AT ITS END UPON THE SIDE FRAMES FRVERTICAL MOVEMENT RELATIVE THERETO, SAID BOLSTER HAVING A FRICTION SHOEPOCKET DEFINED BY A BOTTOM BOLSTER WALL, A BACK BOLSTER WALL, AND ABOLSTER WEDGE WALL DIVERGING UPWARDLY FROM THE BACK WALL, SAID BOTTOM OFTHE WEDGE WALLS DEFINING A RECESS AT THE BOTTOM OF THE WEDGE WALL, AWEAR PLATE OF HARDENED SPRING METAL HAVING A SHANK ENGAGING A WEDGE WALLAND A LOOP PORTION HAVING A SHANK ENGAGING WITH SAID LOOP PORTIONENGAGED AT ITS LOWER EDGE AGAINST AN ABUTMENT SHOULDER ON THE BOTTOMWALL, SAID SHOULDER FACING THE BACK WALL, THE UPPER END OF SAID WEARPLATE BEING TACK WELDED TO SAID WEDGE WALL, A FRICTION SHOE ENGAGING THEPLATE AND THE SIDE FRAME, AND ACTUATING MEANS FOR THE SHOE.